Pulverizing-plow.



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2 Sheets-Sheet l,

(N0 Model.)

Patented Dec. I8, |900.

No. 6er-991;y

' n. .V GILLESPIE.

'PULVERIZING PLDW.

2 Sheets-Sheet 2.

Application led Feb. 5. 1900.)

(No Model.)

UNITED STATES PATENT Frio.

ROBERT T. GILLESPIE, OF ROCHESTER, PENNSYLVANIA.

PU LVERIZING-PLOW.

SPECIFICATION forming part of Letters Patent No. 663,991, dated December 18, 1900. Application led February 5, 1900. Serial No. 3,986. (No model.)

To all whom t may concern:

Be it known that I, ROBERT T. GILLESPIE, a citizen of the United States, residing at Rochester, in the county of Beaver and State of Pennsylvania, have invented or discovered a new and useful Improvement in Pulver-izing-Plows, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which@ Figure 1 is a perspective view of my improved pulverizing-plow. Fig. 2 is a partial similar view illustrating a modified construction of cutters. Fig. 3 is a plan view of the construction' shown in Fig. 2. Fig. (l is a similar view showing a construction provided with barrow-teeth. Fig. 5 is a detail plan view further illustrating this construction. Fig. 6 is a side elevation of the operative portion of the plow. Fig. 7'is arear View. Fig. 8 is a plan view of Fig. 6. Fig. 9 is a similar` view showing the cutter-blades withdrawn from the operative position. Fig. l0 is a vertical sectional view, on an enlarged scale, taken on the line X X of Fig. 7. Fig. 11 is a horizontal sectional view indicated by the line XI XI of Fig. 10. Fig. 12 is a perspective detail view of the double-acting latchbar ring. Fig. 13 is a plan view similar to Figs. 8 and 9, showing a modified construction of cutters mounted at the tail end of th moldboard.

My invention relates to plows; and it consists of certain improvements whereby the plow is rendered capable of more thoroughly breaking up and disintegrating the soil, the

operation occurring simultaneously with andA being supplemental to the turning action of the moldboard.

The object Vof the invention is to cut and.

tends a bolt 7, thus providing bearings for the swinging knife-plates 10. These knifeplates are mounted between the transverse partitions 9 and the upper and lower end members of the frame 8 by means of extended hubs 11, through which the bolt 7 passes, the flat plate portion l0 extending out horizontally, being provided with retaining-lugs 12, between which the blades 13 are held, being secured to the plate by rivets or bolts. Each hub 1v1 is surrounded by a coiled spring 14, one end of which is secured to the frame 8, while the other is secured to the plate l0, the tension of the spring tending to hold the blade forwardly, its movement being limited by a shoulder 15, which abuts against the frame 8 and the spring permitting the bladeto recede partially under excessive pressure and to regain its original position on such pressure being removed or overcome. This frame is capable of being partially rotated upon the extensions 8', carrying with it the blades 13, so that they will occupy an extended position, as in Figs. 1, 6, and 8, or a retracted position, as in Fig. 9, or an intermediate position, wherein they project but partially into the path of the furrow. The frame is rotated and also locked in such operative or inoperative positions by means of a lever 16, pivoted in the side of the frame at 17 and adapted to engage at each side of such pivotal point correspondingupper and lower locking-notches 18 in a circularly-arranged frame 19, rigidly secured to the framework of the plow and normally held in engagement by coiled spring 18.

Slots 20 are provided in the moldboard of the plow, through which the blades project when extended, these being of sufficient length to permit of free action of the blades and of slightly-greater width than that of the blades to give clearance. It will be noted that the blades are independently secured to their supportingplates, permitting of re- `moval when needed for any reason without disturbing the plates; also, that each plate by reason of its elongated hub l1 has a good bearing upon the bolt 7 for the full length of the hub or, if preferred, at top and bottom only, in which case the hub may be recessed in its interior.

In Fig. 13 I have shown a construction in which the blades are mounted immediately in the rear of the moldboard, thereby obviating the necessity of the slots. In this construc- IOO IOS

tion the blades are pivoted at 2l to the end of a swinging frame 22, pivoted at 23 to the inner side of the moldboard 3, and each blade is provided with a shoulder 24, adapted to abut against the frame 22 to limit the outward swing, and a spring 14 bears against the inner side of each blade and keeps them extended. The frame 22 and the blades mounted thereon are held in an extended and partially or wholly retracted position, as indicated by dotted lines, by means of a locking-lever 24', provided with a hook atQthe inner end adapted to engage in one of several holes 25, whereby the swinging frame and the blades may be located at pleasure of the operator.

A still further modification is shown in Figs. 2 and 3, wherein arms 2G are substituted for the blades, carrying at their extremities pivotally-mounted rotating disks 27. All of the arms in this construction are rigidly connected, as has already been described, and are rigidly mounted on a common bolt 28, having a lower and upper pivotal bearing incorporated with the main frame, as has been described. This bolt is provided at the top with a ratchet-wheel 29, having oppositelydisposed teeth adapted to engage pawls SO 30, which hold the bolt and frame rigidly against movement in either direction. The arms carrying the disks have a partial motion on the shaft independent of the movement of the shaft itself, governed by the ratchet and pawls. The movement is back against the springs, the spring action being limited by the shoulders. This motion is in all respects similar to the movement of blades 13 in the frame. In this construction the disks. project outwardly through slots 20, open at the outer ends, and cut the soil in a manner silnilar to the action ot' the blades already described, springs 3l permitting the arms to have a partial backward movement in case of excessive pressure.

In Fig. 4 I have shown a swinging frame 32 mounted in a similar manner at the inner side ofjthe tail endlof the mold board,and upon a rotating bar 33, pivotally mounted in the frame, are mounted flexible barrow-teeth 34, projecting backwardly and downwardly in the path of the furrow, the frame being laterally adjustable by means of a pivoted latchbar 35, adapted to engage notches in the upper edge of a segmental arm 3G, by which means the frame may be set out into operative position, as shown, and intoa withdrawn position, as indicated in dotted lines in Fig. 5. The pivoted bar 33 is rotated to varying positions to alter the pitch of the teeth by means of a lever 37, provided with a handcontrolled latch adapted to be inserted in a segment 38, set in close to the moldboard.

The operation of my invention will be readily understood from the foregoing description and its advantages will be appreciated by those skilled in the art.

I am aware that pulverizing attachments have been used in combination with plows in various ways, but believe I am the first to construct such an implement wherein the attachments are constructed as or capable ot operation in the manner which I have shown and described.

l. In combination with a plow, adjustable cutter-arms adapted to be extended laterally beyond the face of the moldboard and provided with pressure-springs adapted to hold the cutter-arms in extended positions and to permit them to be depressed backwardly.

2. In combination with a plow, adjustable cutter-arms adapted to project laterally beyond the face of the moldboard and to be withdrawn backwardly therefrom and provided with pressure-springs adapted to hold the cutter-arms in extended positions and to permit them to be depressed backwardly.

In combination with a plow, a laterallyswinging frame pivotally mounted behind the moldboard provided with pivoted cutterarms adapted to project laterally beyond the face of the moldboard,

4. In combination with a plow, a laterallyswinging frame pivotally mounted behind the moldboard provided with pivoted cutterarms adapted to project laterally beyond the face of the moldboard, and to be set in varying relations to the face of the moldboard,

5. In combination with a plow, a laterallyswingingframe pivotally mounted behind the mold board, cutter-arms pivotally mounted in the frame adapted to be thrown laterally beyond the face of the moldboard and adapted to be depressed by action against the soil and to react by spring action.

6. In combination with a plow, a laterallyswinging frame pivotally mounted behind the moldboard, cutter-arms pivotally mounted in the frame, springs adapted to exert an outward pressure on the arms, and a latching-lever mounted in the frame adapted to lock the frame in operative and retracted positions respectively.

7. A plow provided with a series of cutters or teeth pivotally mounted in the rear of the moldboard, adapted to swing outwardly into operative position in the path of the furrow, and to be thrown backwardly out of operative position, substantially as set forth.

8. A plow provided with aseries of cutters or teeth pivotally mounted in the rear of the moldboard, adapted to swing outwardly into operative posit-ion in the path of the furrow, and to be thrown backwardly out of operative position, with means for adjusting the cutters or teeth in varying positions, substantially as set forth.

In testimony whereof I have hereunto set my hand.

ROBERT T. GILLESPIE.

In presence of- CHAs. W. HURsT, G. H. MORGAN.

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